en.Wedoany.com Reported - The China Telecom Research Institute, in collaboration with Shanghai Telecom, China Telecom Emergency Company, Tsinghua University, and Shanghai Qingshen Technology, has completed a 6G-oriented high-orbit, medium-orbit, and ground collaborative networking technology trial, leveraging the real-satellite access verification capability of the cloud-network convergence pilot platform. This trial achieved "high-orbit all-weather reliable communication combined with medium-orbit high-bandwidth transmission during connectivity," enabling ubiquitous global communication capabilities. The trial was showcased at the MWC Shanghai 2026 conference and received joint coverage on CCTV-1 and CCTV-13's "Morning News."

For the first time, the trial established a three-dimensional collaborative networking architecture integrating high-orbit, medium-orbit, and ground systems based on a unified satellite-ground integration framework. Leveraging the 36,000-kilometer high-orbit "AsiaSat 9" satellite and the 20,000-kilometer medium-orbit "Smart Sky Network 01" satellite, with communication capabilities of 7 Mbps over 5 MHz bandwidth for high-orbit and 140+ Mbps over 100 MHz bandwidth for medium-orbit, the team built multi-orbit collaborative communication links. The team overcame the dynamic adaptation challenge of time-frequency offset compensation algorithms caused by significant channel differences between high-orbit and medium-orbit satellite-ground links, verifying the feasibility of multi-orbit collaborative networking through ground network integration under transparent forwarding mode of in-orbit satellites.

The trial achieved seamless cross-orbit handover between high-orbit and medium-orbit satellites. Based on a proprietary core technology time-conditioned handover scheme, it predicted satellite coverage time windows and pre-positioned handover preparations, reducing measurement overhead and avoiding handover delays and ping-pong effects. Results showed that the handover delay from terminal reception of RRC (Radio Resource Control) messages to random access was reduced from 363 milliseconds to 26 milliseconds. Moving forward, China Telecom will closely align with the national "15th Five-Year Plan" new infrastructure and 6G future industry layout requirements, continuing to deepen research and systematic trial verification of key 6G satellite-ground integration technologies, contributing to the construction of the next-generation communication network.

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